This circuit was obtained from Elektor magazine and published in the Encyclopedia of Electronic Circuits Vol 5 of 1995. Transistors are RF types that are still common today.
The name of the receiver found in a March 1957 Popular Electronics comes from the fact that the...
This is the basic configuration for using the ULN2001 and MC1441 and others of the same series in...
This circuit was obtained in a 1978 publication, but it can be assembled with equivalent...